EP0589397B1 - Laser diode driving circuit and optical transmission device - Google Patents
Laser diode driving circuit and optical transmission device Download PDFInfo
- Publication number
- EP0589397B1 EP0589397B1 EP93115119A EP93115119A EP0589397B1 EP 0589397 B1 EP0589397 B1 EP 0589397B1 EP 93115119 A EP93115119 A EP 93115119A EP 93115119 A EP93115119 A EP 93115119A EP 0589397 B1 EP0589397 B1 EP 0589397B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- laser diode
- optical transmission
- transmission device
- bias
- transistors
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/06—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
- H01S5/062—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium by varying the potential of the electrodes
- H01S5/06209—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium by varying the potential of the electrodes in single-section lasers
- H01S5/06213—Amplitude modulation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/04—Processes or apparatus for excitation, e.g. pumping, e.g. by electron beams
- H01S5/042—Electrical excitation ; Circuits therefor
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/501—Structural aspects
- H04B10/503—Laser transmitters
- H04B10/504—Laser transmitters using direct modulation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/04—Processes or apparatus for excitation, e.g. pumping, e.g. by electron beams
- H01S5/042—Electrical excitation ; Circuits therefor
- H01S5/0427—Electrical excitation ; Circuits therefor for applying modulation to the laser
Definitions
- the present invention relates to an optical transmission device which is used for a short range optical data link or an optical communication system for subscribers and more particularly to an optical transmission device which requires no automatic optical power control.
- an automatic optical power control method that is, a control method for monitoring optical power of a laser diode, feeding back a bias current and electric modulation current, and obtaining fixed optical power from the laser diode without depending on changes in the electric threshold current value which are caused by temperature changes is used, the circuit configuration becomes complicated.
- the fixed-bias electric current in the state that the fixed-bias electric current is set so that it becomes equal to the electric threshold current value of the laser diode at a high temperature in an assumed operating temperature area range as in Ref. B, the fixed-bias electric current becomes larger than the electric threshold current value of the laser diode at a low temperature in the operating temperature area range (I b > I th (at a low temperature)). Therefore, the optical power level (extinction level) increases when an electric input signal to the laser diode is off and it disturbs unformatted data optical transmission by fixed level decision receiving system described in Ref. A.
- the turn-on delay time increases compared with that when a bias electric current is applied to this laser diode.
- a laser diode driving circuit with the features of the first part of claim 1 is known from JP-A-59 028 396.
- An object of the present invention is to minimize the turn-on delay time of a laser diode and to enable unformatted optical signal transmission by fixed level decision receiving system.
- the turn-on delay time of the laser diode can be minimized.
- the fixed level decision receiving system can be used and the optical receiver circuit can be simplified.
- optical receiver circuit using the above constitution can be simplified compared with that when the automatic optical power control is applied.
- Fig. 1 shows an embodiment of the driving circuit of laser diode of the present invention.
- An electric input signal 1 is supplied to a laser diode 3 via a current switch 2.
- a fixed-bias electric current I b which is not more than the electric threshold current value I th of the laser diode is applied to the laser diode 3 by a bias circuit 4.
- the Si bipolar IC process is used.
- Fig. 2 shows a bias electric current of the driving circuit of laser diode and the dependency of electric threshold current value of the laser diode on temperature which will be described later.
- the bias electric current of a driving circuit 5 of laser diode ranges from 1.64 mA to 2.75 mA within the operating temperature area range from 20°C to 80°C under the condition that the supply voltage variation of the driving circuit is 10% and the resistance variation due to the production process variation is 20%.
- the electric threshold current value of the laser diode 3 ranges from 2.92 mA to 10.33 mA within the operating temperature area range from 20°C to 80°C under the condition that the electric threshold current value at 25°C when the characteristic temperature is 55°C, varies within a range from 3.2 mA to 3.8 mA.
- the electric threshold current value of the laser diode 3 varies as shown in Fig. 2 within the entire temperature range from 20°C to 80°C and the bias electric current of the driving circuit of laser diode can be set less than the electric threshold current value of the laser diode actually on the side of the driving circuit 5 of laser diode regardless of characteristics of the laser diode 3 such as changes in the electric threshold current value due to changes in the temperature.
- Fig. 3 shows an optical transmission device using the driving circuit of laser diode and the fixed level decision optical receiver described in Ref. A.
- the turn-on delay time can be reduced to about 1/7 of that in the case of zero-bias driving.
- Figs. 4(a) and 4(b) show characteristic examples of the laser diode.
- Fig. 4(a) shows the relationship between turn-on delay time T d and ln((I d -I b )/(I d -I th ) when the driving current of laser diode I d is fixed at 20 mA and the bias electric current I b is changed at 25°C.
- the electric threshold current value Ith of this laser diode at 25°C is 2.8 mA.
- the buildup ratio for turn-on delay time decreases from around the point where Ib becomes larger than 1.0 mA. It is found that the point is in the neighborhood of the current value corresponding to a threshold voltage Vth of I b -V plot when the static characteristic graph (dependency of forward voltage and resistance on bias electric current) shown in Fig. 4(b) is compared with Fig. 4(a).
- the semiconductor laser is a semiconductor device having a pn junction. Therefore, when a forward bias of approximately the built-in potential of the laser diode is given beforehand, the resistance of the laser diode decreases and an electric current can be easily supplied to the laser diode.
- the Si bipolar IC process is used to produce a driving circuit of laser diode.
- other bipolar, MOS, or FET systems may be used.
- the laser diode may be produced on a n-substrate, too.
- a bias electric current which is smaller than the electric threshold current value and larger than the current value corresponding to threshold voltage V th is applied to the laser diode.
- the driving circuit of the laser diode of the embodiment shown in Fig. 1 may be modified to a monolithic array circuit as shown in Fig. 5 as indicated in Ref. A.
- the circuit is a monolithic circuit consisting of a plurality of channels.
- a multi-channel optical transmitter having a laser diode array and a driving circuit array of laser diode array having a means of applying a fixed-bias electric current which is not more than each electric threshold current value of the laser diode array, a multi-channel optical transmitter having a small electric crosstalk can be constructed.
- an intensive temperature characteristic may be given to the fixed bias electric current of the driving circuit of laser diode.
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Optics & Photonics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Semiconductor Lasers (AREA)
- Optical Communication System (AREA)
Description
Claims (7)
- An optical transmission device comprising a laser diode (3) and a laser diode driving circuit (5) having a current switch (2) for supplying a driving current to the laser diode, and a bias circuit (4) for fixing a bias current (Ib) supplied by the driving circuit (5) to the laser diode (3),
characterised in that
said bias circuit (4) is adapted to fix said bias current (Ib) supplied by the driving circuit (5) to the laser diode (3) independently from a laser oscillation output such that said bias current is smaller than the threshold current value (Ith) of the laser diode within a predetermined operating temperature area but is larger than a current value corresponding to a built-in potential of said laser diode so that the turn-on delay time of the laser diode (3) is shorter than a turn-on delay time at said current value corresponding to said threshold voltage. - A system comprising an optical transmission device according to claim 1 and a fixed decision-level optical receiver coupled to said laser diode (3) via an optical transmission path.
- An optical transmission device according to claim 1 comprising an array of laser diodes and an array of driving circuits each as specified in claim 1.
- A system comprising an optical transmission device according to claim 3 and a fixed decision-level parallel optical receiver.
- An optical transmission device according to claim 1, wherein the transistors in said current switch (2) and the transistors in said bias circuit (4) are bipolar transistors.
- An optical transmission device according to claim 1, wherein the transistors in said current switch (2) and the transistors in said bias circuit (4) are MOS transistors.
- An optical transmission device according to claim 1, wherein the transistors in said current switch (2) and the transistors in said bias circuit (4) are field effect transistors.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP254359/92 | 1992-09-24 | ||
JP25435992 | 1992-09-24 | ||
JP25435992A JP3226624B2 (en) | 1992-09-24 | 1992-09-24 | Laser diode drive circuit and optical transmission device |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0589397A1 EP0589397A1 (en) | 1994-03-30 |
EP0589397B1 true EP0589397B1 (en) | 2002-05-02 |
Family
ID=17263898
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP93115119A Expired - Lifetime EP0589397B1 (en) | 1992-09-24 | 1993-09-20 | Laser diode driving circuit and optical transmission device |
Country Status (4)
Country | Link |
---|---|
US (2) | US5675599A (en) |
EP (1) | EP0589397B1 (en) |
JP (1) | JP3226624B2 (en) |
DE (1) | DE69331870T2 (en) |
Families Citing this family (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2545557B2 (en) * | 1987-11-12 | 1996-10-23 | ハマダ印刷機械株式会社 | Winding paper end treatment method and device |
EP0771299A2 (en) * | 1994-07-20 | 1997-05-07 | Minnesota Mining And Manufacturing Company | Apparatus for applying adhesive tape |
IT1285852B1 (en) * | 1996-04-24 | 1998-06-24 | Cselt Centro Studi Lab Telecom | HIGH SPEED PILOTING CIRCUIT OF OPTICAL SOURCES MADE IN CMOS TECHNOLOGY. |
JPH1093170A (en) * | 1996-09-10 | 1998-04-10 | Fuji Xerox Co Ltd | Laser diode drive circuit, semiconductor integrated circuit for driving laser diode, and image recorder |
JP3315892B2 (en) * | 1997-04-24 | 2002-08-19 | 沖電気工業株式会社 | Laser module control circuit |
US5963570A (en) * | 1997-05-12 | 1999-10-05 | At&T Corp. | Current control for an analog optical link |
US6018538A (en) * | 1997-06-18 | 2000-01-25 | Lucent Technologies Inc. | High speed non-biased semiconductor laser dione driver for high speed digital communication |
JP3736953B2 (en) * | 1997-10-20 | 2006-01-18 | 富士通株式会社 | Electroabsorption optical modulator drive circuit and optical transmitter using the same |
JPH11191755A (en) * | 1997-10-21 | 1999-07-13 | Furukawa Electric Co Ltd:The | Optical transmission system, node device therefor and optical transmission equipment |
EP0924823A1 (en) * | 1997-12-17 | 1999-06-23 | Hewlett-Packard Company | Driver circuit for a solid state optical emitter device |
JPH11208017A (en) * | 1998-01-30 | 1999-08-03 | Canon Inc | Light-emitting element driving apparatus |
JP3139442B2 (en) * | 1998-02-17 | 2001-02-26 | 日本電気株式会社 | Optical transmitter |
US6021143A (en) * | 1998-04-21 | 2000-02-01 | Lucent Technologies, Inc. | Dynamic control for laser diode drivers |
US6021144A (en) * | 1999-02-24 | 2000-02-01 | Nvision, Inc. | Automatic power control circuit for a laser driver |
EP1204227B1 (en) * | 1999-08-13 | 2006-12-27 | Fujitsu Limited | Optical communication system and terminal device |
US6624917B1 (en) * | 1999-10-28 | 2003-09-23 | International Business Machines Corporation | Optical power adjustment circuits for parallel optical transmitters |
US6609842B1 (en) | 2000-03-27 | 2003-08-26 | Marconi Communications, Inc. | Linear laser driver circuit |
US6707833B1 (en) | 2000-03-31 | 2004-03-16 | Marconi Communications, Inc. | Digital laser driver circuit |
JP2002232072A (en) * | 2001-01-30 | 2002-08-16 | Sony Corp | Semiconductor laser driving circuit |
US6667661B1 (en) | 2001-05-04 | 2003-12-23 | Euvis, Inc. | Laser diode driver with high power efficiency |
US6917639B2 (en) * | 2001-08-09 | 2005-07-12 | Ricoh Company, Ltd. | Laser driver circuit |
JP2003163412A (en) | 2001-11-28 | 2003-06-06 | Sharp Corp | Nitride semiconductor laser device semiconductor optical device |
EP1642276A2 (en) * | 2003-06-27 | 2006-04-05 | Koninklijke Philips Electronics N.V. | A method of controlling a diode device for use in optical storage systems |
EP2189806B1 (en) * | 2008-11-20 | 2011-05-18 | Sick Ag | Optoelectronic sensor |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5928396A (en) * | 1982-08-10 | 1984-02-15 | Nec Corp | Semiconductor laser drive device |
NZ218022A (en) * | 1985-10-22 | 1991-01-29 | Fujitsu Ltd | Compensated regulation of light output from semiconductor laser |
DE3608930A1 (en) * | 1986-03-18 | 1987-09-24 | Standard Elektrik Lorenz Ag | METHOD FOR REGULATING THE OPTICAL PERFORMANCE OF A LASER AND CIRCUIT FOR IMPLEMENTING THE METHOD |
US5027362A (en) * | 1988-12-29 | 1991-06-25 | At&T Bell Laboratories | Laser control method and circuitry |
US5127015A (en) * | 1990-04-17 | 1992-06-30 | Sharp Kabushiki Kaisha | Driving circuit of a semiconductor laser |
JP3423115B2 (en) * | 1995-07-18 | 2003-07-07 | 富士通株式会社 | Optical signal transmission device |
-
1992
- 1992-09-24 JP JP25435992A patent/JP3226624B2/en not_active Expired - Fee Related
-
1993
- 1993-09-20 DE DE69331870T patent/DE69331870T2/en not_active Expired - Lifetime
- 1993-09-20 EP EP93115119A patent/EP0589397B1/en not_active Expired - Lifetime
-
1996
- 1996-03-12 US US08/614,029 patent/US5675599A/en not_active Expired - Lifetime
-
1997
- 1997-07-01 US US08/886,254 patent/US5870418A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE69331870T2 (en) | 2003-01-16 |
JPH06112561A (en) | 1994-04-22 |
US5675599A (en) | 1997-10-07 |
JP3226624B2 (en) | 2001-11-05 |
US5870418A (en) | 1999-02-09 |
DE69331870D1 (en) | 2002-06-06 |
EP0589397A1 (en) | 1994-03-30 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0589397B1 (en) | Laser diode driving circuit and optical transmission device | |
US4359773A (en) | Semiconductor lasers with selective driving circuit | |
Takai et al. | 200-Mb/s/ch 100-m optical subsystem interconnections using 8-channel 1.3-/spl mu/m laser diode arrays and single-mode fiber arrays | |
US5396059A (en) | Digital processor-controlled arrangement for monitoring and modifying system operating parameters | |
US5933265A (en) | Optical receiver module for an optical communication transmission system | |
US5590145A (en) | Light-emitting apparatus capable of selecting polarization direction, optical communication system, and polarization modulation control method | |
US4284884A (en) | Electro-optic devices | |
GB1563944A (en) | Imjection lasers | |
US20040264523A1 (en) | Temperature compensation circuit to maintain ratio of monitor photodiode current to fiber coupled light in a laser | |
US5175641A (en) | Dual-mode laser diode transmitter | |
JP3264669B2 (en) | Laser control method and its device | |
US5379143A (en) | Optical regenerative-repeater system | |
US20020162953A1 (en) | Optical output control circuit for obtaining stable optical output power | |
US4483004A (en) | Laser functional device | |
US20040012842A1 (en) | Optical amplifier | |
Shumate et al. | Lightwave transmitters | |
US10177854B2 (en) | Modulated optical source and methods of its operation | |
EP0422852A2 (en) | Method of producing a semiconductor laser adapted for use in an analog optical communications system | |
US5991059A (en) | Marshalling in optical TDMA systems | |
JP2000124541A (en) | Semiconductor laser and module thereof | |
JP2694803B2 (en) | Optical semiconductor laser device wavelength stabilization method | |
Miura et al. | Reliable, compact, CMOS interface, 200-Mbit/sa 12-channel optical interconnects using single-mode fiber arrays | |
US20030227950A1 (en) | Laser module | |
Mino et al. | High-speed optoelectronic hybrid-integrated transmitter module using a planar lightwave circuit (PLC) platform | |
JPS60186138A (en) | Automatic light output control circuit |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE FR GB |
|
17P | Request for examination filed |
Effective date: 19940930 |
|
17Q | First examination report despatched |
Effective date: 19970530 |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: OPNEXT JAPAN, INC. |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: IF02 |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE FR GB |
|
RIC1 | Information provided on ipc code assigned before grant |
Free format text: 7H 04B 10/04 A, 7H 01S 5/06 B |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D |
|
REF | Corresponds to: |
Ref document number: 69331870 Country of ref document: DE Date of ref document: 20020606 |
|
ET | Fr: translation filed | ||
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed |
Effective date: 20030204 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20100728 Year of fee payment: 18 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20110922 Year of fee payment: 19 Ref country code: GB Payment date: 20110914 Year of fee payment: 19 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20120920 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST Effective date: 20130531 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20130403 Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20120920 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20121001 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R119 Ref document number: 69331870 Country of ref document: DE Effective date: 20130403 |